Package: linux-source-3.2
Version: 3.2.57-3
The symbol skb_copy_ubufs() is not exported in net/core/skbuff.c, even though
it is exposed in include/linux/skbuff.h and used by skb_orphan_frags(). OVS
kernel module fails to start due to this:
Error: Module openvswitch is not currently loaded
ERROR: could not insert 'openvswitch': Unknown symbol in module, or unknown
parameter (see dmesg)
dmesg output:
[ 3315.819202] openvswitch: Unknown symbol skb_copy_ubufs (err 0)
/lib/modules/3.2.0-4-amd64/source/include/linux/skbuff.h has this:
static inline int skb_orphan_frags(struct sk_buff *skb, gfp_t gfp_mask)
{
if (likely(!(skb_shinfo(skb)->tx_flags & SKBTX_DEV_ZEROCOPY)))
return 0;
return skb_copy_ubufs(skb, gfp_mask);
}
But /usr/src/linux-source-3.2/net/core/skbuff.c only has this:
int skb_copy_ubufs(struct sk_buff *skb, gfp_t gfp_mask)
{
int i;
[snipped]
return 0;
}
Note the missing EXPORT_SYMBOL() after the function definition.
It seems that skb_copy_ubufs() has been exported in Linux 3.6, as the
skb_orphan_frags() was introduced. Now Debian 3.2.57-3 has a backported
skb_orphan_frags(), but the export of the symbol sib_copy_ubufs() was not
backported.
Regards,
Jarno Rajahalme
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